CN100455799C

CN100455799C - Valve disk of hermetic compressor

Info

Publication number: CN100455799C
Application number: CNB200410072658XA
Authority: CN
Inventors: 朴圣云
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2004-11-05
Filing date: 2004-11-05
Publication date: 2009-01-28
Anticipated expiration: 2024-11-05
Also published as: CN1769700A

Abstract

The present invention discloses a valve disk of a hermetic compressor, which belongs to a hermetic compressor structure. The present invention comprises a disk body with through holes, the disk body controls working fluid to go in and go out of a compression chamber, and an annular groove which encircles the rim angle position of the compression chamber at one side of the disk body is formed. Therefore, the present invention also has the advantages of simple parts forming the compressor, relatively easy whole compressor manufacture process, less work hour, low manufacture cost, high compressor starting efficiency, high reliability and less noise.

Description

The valve dish of closed compressor

Technical field

The present invention relates to the structure of closed compressor.More detail is about being formed on the compresser cylinder, be arranged on the valve dish that possessing of pressing chamber inlet has a kind of closed compressor of inlet hole that working fluid passes through and tap hole.

Background technique

Fig. 1 is existing closed compressor vertical profile structural front view.

At first, seal container 1 is to be made of upper container 1t and bottom container 1b, and is formed with confined space in inside.Be provided with framework 2 in the inside of seal container 1.Be fixed with stator 3 in the bottom of framework 2, stator 3 is in the effect lower support of the spring 2S inside at seal container 1.Have and stator 3 rotatable rotor 4 under electromagnetic field interacts in the inside of stator 3.Rotor 4 and the crankshaft 5 one rotation that connects framework 2 central parts.

Possessing in the lower end of crankshaft 5 has the Oil sucking device 5d that draws crankshaft 5 interior oil L upward.Oily L by Oil sucking device 5d disperses at the cam pin 5b place of the eccentric a little formation of rotating center of crankshaft 5 relatively along oil circuit 5a.Reverse side at cam pin 5b has the equilibrium block 5c that adjusts cam pin centre-of gravity shift that 5b causes with crankshaft 5 integrally formed being used to.

One end of connecting rod 8 links to each other with the cam pin 5b of crankshaft 5.The other end of connecting rod 8 links to each other with piston 7, and rotatablely moving of crankshaft 5 is converted to the straight reciprocating motion of piston 7.Piston 7 possess cylinder 6 pressing chambers 6 that framework 2 is arranged ' in carry out straight line motion and compression working fluid.

Pressing chamber 6 ' end at cylinder 6 is equipped with valve member 9 and top cover 10.As shown in Figure 2, particularly the pressing chamber 6 ' inlet of cylinder 6 directly be equipped with the valve dish 9 that constitutes valve member 9 '.

Absorbing silencer 11 is to be assemblied on the top cover 10, and the working fluid noise that is fed to pressing chamber is reduced.Give absorbing silencer 11 supplying working fluids by the suction lead 12 that connects seal container 1.The discharge conduit of drawing symbol 13 is the parts that the working fluid in pressing chamber 6 ' interior compression and discharge are fed to the compressor outside.

But there are the following problems as the closed compressor of the prior art of above-mentioned formation.

Valve dish 9 ' pressure is put on cylinder 6, and piston 7 carries out the temperature rising that the high-speed straight-line to-and-fro motion causes cylinder 6 in pressing chamber 6 ' inside.Shown in Fig. 3 a, under the effect that cylinder 6 temperature rise, slowly can be out of shape, and cause piston 7 motions not slick and sly as cylinder 6 parts of pressing chamber 6 ' end.The problems such as the pressure loss, noise and reliability decrease that can occur compressor in this case.

In order to solve as above-mentioned problem, shown in Fig. 3 b, at the corner location of the pressing chamber 6 ' end of cylinder 6 around forming end difference portion 6s, perhaps shown in Fig. 3 c, at the terminal corner location of piston 7 around carrying out circular arc processing.

But cylinder 6 is by castiron, and for the outer side surface with piston 7 slides, its internal diameter needs fine finishing.Therefore, it is not all right that end difference portion 6s is simply processed, and should be to carry out fine finishing after increasing end difference portion 6s.Therefore, the problem in man-hour appears increasing in the operation of making cylinder 6.

If carry out circular arc processing along the corner location of piston 7, make piston 7 and carry out the center and grind synthetic job and just become impossiblely, cause occurring the problem that the manufacture cost of piston 7 rises greatly.

Summary of the invention

Therefore, in order to solve problem, and a kind of valve dish of oversimplifying the closed compressor of closed compressor manufacturing technology is proposed as above-mentioned prior art.

For realizing as above-mentioned purpose of the present invention, according to characteristics of the present invention, the valve dish of closed compressor, it comprises the disk body that through hole is arranged of control discrepancy pressing chamber inside and outside working fluid; And be formed with circular groove around the pressing chamber corner location in a side of disk body.

The valve dish of described closed compressor, its circular groove is bigger than the compression chamber radius by outer radius, inner radius constitutes than compression chamber radius circlet shape groove.

The valve dish of described closed compressor, its disk body is processed to form by sintering or sheet metal.

The valve dish of described closed compressor, the inboard corner location of its circular groove and outside corner location are to be formed by the curved surface that certain curvature is arranged.

As above-mentioned detailed description, the valve dish of closed compressor is to form the part that can hold cylinder deformation on the position of being convenient to relatively process.

Therefore can obtain the effect that the parts of making the formation compressor are simpler, the manufacture process of whole compressor is relatively easy, reduce manufacture cost.

The advantage that also has the making man-hour that reduces whole compressor, the starting efficiency that improves compressor and reliability, minimizing noise according to the present invention of formation like this.

Description of drawings

Fig. 1 is existing closed compressor vertical profile structural front view;

Fig. 2 is the vertical profile structural representation of existing closed compressor valve dish;

Fig. 3 a is the A portion structure for amplifying schematic representation of Fig. 2;

Fig. 3 b is the vertical profile structural representation of air cylinder structure in other prior art;

Fig. 3 c is the B portion structure for amplifying schematic representation of Fig. 2;

Fig. 4 is that closed compressor valve dish of the present invention is arranged on the sectional view on the terminal surface;

Fig. 5 is a plane structure chart of the present invention;

Fig. 6 is A-A ' the partial cross section structural drawing of Fig. 5.

Explanation to pith symbol in the drawing:

20: cylinder 22: pressing chamber

24: piston 26: connecting rod

30: valve dish 31: disk body

32,33: through hole 35: circular groove

37: pilot hole.

Embodiment

It is following that the present invention is described in detail with reference to drawings and Examples.

Fig. 4 is that the embodiment of closed compressor valve dish of the present invention is arranged on the sectional view on the terminal surface; Fig. 5 is a plane structure chart of the present invention; Fig. 6 is A-A ' the partial cross section structural drawing of Fig. 5.

As shown in the figure, pressing chamber 22 is to connect cylinder 20 and form.Be provided with piston 24 in the inside of pressing chamber 22.Piston 24 is to link to each other with crankshaft (not shown) under the effect of connecting rod 26 and pass on power.Piston 24 is the rotating forces that receive crankshaft by connecting rod 26, carries out straight reciprocating motion in pressing chamber 22.

The terminal surface of the inlet of pressing chamber 22 and cylinder 20 is provided with valve dish 30.Valve dish 30 is parts that constitute the valve member of Control work fluid turnover pressing chamber 22 inside.In order to narrate conveniently, only illustrate the valve dish 30 that constitutes in the valve member key element.

Now the structure to valve dish 30 is described as follows: the disk body 31 that constitutes valve dish 30 is made of quadrilateral thin plate.Disk body 31 is generally made by sintering or sheet metal processing mode.That is, disk body 31 is to be made by the sintering raw material, perhaps sheet metal is carried out sheet metal and processes and make.

Connect disk body 31 and form the 1st and the 2nd through hole 32,33.Through

hole

32,33 is communicated with pressing chamber 22 and outside separately, and becomes the path of working fluid discrepancy pressing chamber 22.That is, one is the inlet holes that suck working fluids to pressing chamber 22 inside in the through

hole

32,33, and another is the tap hole of discharging the working fluid that has compressed.When through hole the 32, the 33rd, valve dish 30 are assembled on the cylinder 20, with position that pressing chamber 22 is communicated with on form.

On disk body 31, be formed with the circular groove 35 of ring-type.Circular groove 35 is when valve dish 30 is set on the cylinder 20, forms on the inlet corner location of corresponding pressing chamber 22.That is, the inlet corner location of pressing chamber 22 is arranged on corresponding with circular groove 35 locational.

For this reason, the inner radius r of circular groove 35 is littler than the radius of pressing chamber 22, and the outer radius R of circular groove 35 is bigger than the radius of above-mentioned pressing chamber 22.The degree of depth of circular groove 35 is several microns to tens of microns.This is to minimize for interstitial volume.

On the one hand, circular groove 35 constitutes with ring-type in the accompanying drawing of present embodiment, but not necessarily must so constitute.As long as determine the inlet corner location of pressing chamber 22, no matter just which kind of shape it constitutes.

Circular groove 35 is to form with disk body 31 time.That is, circular groove 35 adds formation in man-hour in sintering processing or sheet metal.For example, when being processed to form disk body 31, sheet metal forms through

hole

32,33 and circular groove 35 etc.

Inboard and outside corner location upper end at circular groove 35 as shown in Figure 6, form the curved surface that has certain curvature.And the inlet side of formation is wideer relatively than the inner side surface of circular groove 35.Such curved surface is when forming circular groove 35, can form naturally.Like this inlet side wideer relatively when forming, even make the width of circular groove 35 of formation narrower relatively, circular groove 35 also is positioned at the inlet corner location of pressing chamber 22 easily.

Four angle adjacents at disk body 31 are formed with pilot hole 37 separately.Pilot hole 37 is for valve dish 30 being assembled to the part that cylinder 20 screwings run through.

Below describe the effect of the present invention that so constitutes in detail.

In the present invention, valve dish 30 is arranged on the terminal surface of cylinder 20, can allow working fluid pass through the inside and outside of the 1st and the 2nd through

hole

32,33 discrepancy pressing chambers 22.

Be that piston 24 is to pass on driving force to carry out straight reciprocating motion in pressing chamber 22 inside by connecting rod 26, working fluid is sucked pressing chamber 22 inside, and compression discharged.At this moment, the straight reciprocating motion of piston 24 is carried out under high speed, distortion can occur in the pressing chamber 22 inlet corner locations part of such motion lower cylinder 20.

But when the pressing chamber 22 inlet corner locations of cylinder 20 partly were out of shape, distortion was carried out to circular groove 35 parts, so can not occur the distortion of cylinder 20 wall portions to pressing chamber 22 inboards.

On the one hand, between the valve dish 30 and cylinder 20 that closely are provided with mutually, form and accommodate the crushed element that takes place in the use in the present invention, promptly on the valve dish of being convenient to relatively process 30, form circular groove 35.

That is, not on accurately machined pressing chamber 22 inwalls of needs, but on the valve dish 30 of available sintering work or the formation of sheet metal easy processing, form circular groove 35.

Therefore, when make constituting the disk body 31 of valve dish 30, for example, can form the 1st and the 2nd through

hole

32,33 etc. and circular groove 35 simultaneously.Like this, making the parts that constitute compressor just is more prone to.

Circular groove 35 is may be at the terminal absolute volume that takes place of pressing chamber by its depth minimization is reduced, particularly form its inboard and outside corner location curved surface, by when expansion reduces circular groove 35 inboard width gradually to inlet, the curved surface that is formed on circular groove 35 ends is contacted in circular groove 35 inside with plane cylinder 20 terminal surfaces.

But the curved surface that forms on circular groove 35 inboards and outside corner location does not need to add special operation, and when forming circular groove 35, form naturally.

Claims

1. the valve dish of a closed compressor, it comprises the come in and go out disk body that through hole is arranged of pressing chamber inside and outside working fluid of control; A side that it is characterized in that disk body is formed with circular groove around the pressing chamber corner location, and circular groove is bigger than the compression chamber radius by outer radius, inner radius constitutes than compression chamber radius circlet shape groove.

2. the valve dish of closed compressor according to claim 1 is characterized in that disk body is processed to form by sintering or sheet metal.

3. the valve dish of closed compressor according to claim 1 is characterized in that the inboard corner location of circular groove and outside corner location are to be formed by the curved surface that certain curvature is arranged.